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Blowing film manufacturing process
- Nov 01, 2018 -

In the heated drum, the PE particles are pushed by the screw to the circular die port, and the compressed air inflates the melt, and after being air-cooled, the film is wound up. The properties of the blown film in the transverse and longitudinal directions are different.

The machine direction elongation of the protective film is generally greater than 180%; the lateral elongation is generally greater than 380%. However, the elongation is inversely proportional to the mechanical strength. If the elongation is too large (for example, greater than 500%), the mechanical strength of the film tends to be low, which may cause damage to the protective film during transportation and handling. And the protective film is easily elongated when unwinding.

Conclusion: Due to the user's lack of understanding of the protective film, it is often wrong to choose the wrong protective film. As long as the rigorous experiment and professional control, the temper of the protective film can be accurately grasped, and the surface of the protective film aluminum-plastic composite board can be protected. There is no increase in any troubles.